Vacuum-pump.



H. B. OOOLEY.

VACUUM PUMP.

APPLIOATION FILED DEC. 2a, 1908.

Patented Oct. 10, 1911.

2 SHEETS-SHEET 1.

INVENTOR.

TTORNEY.

WITNESSES: R 9, new

H. B. GOOLEY.

VACUUM PUMP.

APPLICATION FILED M0. 2a, 1900.

TORNE Yv SATES BARN FFTQE.

HENRY B. COOLEY, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR. TO THE AMERICAN PAPER GOODS COMPANY, OF MONTCLAIR, NEW JERSEY, A CORPORATION OF NEW JERSEY.

VACUUM-PUMP.

Specification of Letters Patent.

Patented Oct. 10, 1911.

To all whom it may concern:

Be it known that I, HENRY B. CooLEY, a citizen of the United States, and a resident of New Britain, in the county of Hartford and State of Connecticut, have invented a new and Improved Vacuum-Pump, of which the following is a specification.

My invention relates generally to the class of devices for producing suction and the object of the invention is to provide a device of this class that shall be positive and efli cient in its operation and generally one that shall possess novel features of advantage and utility.

One form of device embodying in its operation the objects and features of advan tage herein set out is illustrated in the accompanying drawings, in which Figure l is a view in side elevation of a portion of a machine embodying my im proved vacuum pump, with parts broken away to show construction. Fig. 2 is a detail bottom view of the cylinders. Fig. 3 is a detail side view of the bottom portion of the cylinders showing the relief valve. Fig. 4 is a detail view showing another form of embodiment of the invention, with parts broken away to show construction. Fig. 5 is a detail end view of the device shown in Fig. 4 with parts broken away to show construction. Fig. 6 is a detail diagrammatic view showing another form of embodiment of the invention.

The apparatus herein illustrated and described and embodying my invention shows one application of the many to which my invention may be put and in which the pneumatic force or power is exerted at a high degree sufficient in such a device as well as in others for handling all grades of material.

The invent-ion also contemplates apparatus in the use of which the time of action of the pneumatic apparatus may be accurately controlled, thus enabling the full effects of such device to be obtained only at the time or times required.

The invention also contemplates a construction of apparatus in which the full force of the pneumatic mechanism may be brought into action at once.

In the preferred form of apparatus, and as shown herein, a pump having a reciprocating piston is employed for producing the required pneumatic force, the latter being obtained as by means of a vacuum of such degree as may be required, but my invention is not limited to use with feeding devices nor necessarily for vacuum producing purposes, as it is capable of wide and varied use and the construction and-uses set out herein may be departed from to a greater or lesser -extent and yet be within the spirit and intent of the invention.

In the accompanying drawings the numeral 6 indicates side parts of the frame of the machine, that may be constructed of any suitable material in such form as may be desired to provide proper supports for the mechanism. It will be understood that these side parts are united by such proper crosspieces or bars as will readily suggest themselves to those skilled in the construction of this class of machinery to secure the required rigidity and stability.

A pile 9 'of sheets of material to be operated upon is supported between posts 13. A driving pulley 11 and a disk 12 are secured to a driving shaft 10 mounted in the frame, arms 14 supported by this shaft each bearing a gear 15 in meshes with the main gears 16 secured to the shaft 10.

The views selected herein for illustration -of my invention show some parts of the mechanism now being described at one side of the machine only, other parts being hidden from view. This mechanism, however, is clearly shown in a patent granted to me December 31, 1907, No. 874,943, to which the invention herein is especially applicable and reference is hereby made to such patent if necessary for a more complete understanding of the relative location, construction and operation of the parts as a whole. Pinions 17 mounted upon studs 18 on the arms 14 mesh with said gears 15, and links 19 are pivoted upon studs 18, the opposite end of each link being pivotally connected to a slide 20 mounted in a guide-way or slot- 21 in each of the side parts 6. A suction tube 22 is suitably journaled in the slides 20, the links 19 being pivotally secured to said tube, as shown in Fig. 3 of the drawings.

The sheets are taken from the pile 9 by means of a suitable picker communicating with an air passage or duct 29 in the tube 22, this mechanism including rolls mounted on the tube 22 together with cooperating rolls upon the shaft 26, these parts being rotated as by means of a pinion 33 secured to the tube 22 and meshing with the teeth of a rack plate 34: secured to the frame of the machine as plainly shown in my patent hereinbefore referred to.

Slides 20 are reciprocated from a shaft 35 oscillated by means of an eccentric 36 se cured to the driving shaft 10, a connecting rod 37 extending from the strap of the eccentric to a short arm 38 secured to said shaft 35. Levers 39 and links 40 complete the connection between the main shaft 10 and said slides.

The conductor shaft 26 is mounted in boxes 41 movably located in slots 42 in the slides 20, springs 43 forcing the shaft toward the picker 32 and holding the roller grips in yielding engagement.

Pivotally mounted buffer levers 45 yieldingly connected by a spring 46 support buffer posts or pins.

The force of a pump exerted through a flexible connection 52 with the tube 22 is employed to remove articles from the pile 9. This pump includes a main cylinder 53 having a head 5& pivotally secured to the frame as by means of a pivot 55. A piston 56 is located within the cylinder, a piston rod 57 to which the piston is secured being connected at its outer end with a pin 58 on the disk 12. A relief valve 59 is secured to the head 54c and aflfords a means of regulating the amount of pressure exerted by the pump, this valve being preferably spring actuated. In the preferred form as herein shown a plate 70 is secured to the head 54 and a clapper 60 is pivotally attached to the plate 70. An arm 71 projects from the head 54 and a spring 72 is employed to hold the clapper and the valve 59 gently on its seat. An adjusting screw 7 3 projects through the clapper and a set screw 74: may be employed to hold the adjusting screw in any position of adjustment. It will be seen from this construction that the air may be allowed to enter the main cylinder to any desired extent and thus nicely regulate the amount of vacuum which will be exerted by the pump and consequently the force exerted by the pickers.

A passage 61 extends through the head 54 and leads to a passage 62 formed in the head 63 of an auxiliary cylinder 64:. A piston valve 65 is secured to a piston rod 66 located within the auxiliary cylinder 64, this rod being adjustably secured to an arm 67 carried by the piston rod 57. In the preferred form of connection the end of the rod 66 is threaded and bears nuts 68 located on opposite sides of the arm 67 as a means of adjusting the position of the piston valve 65. A port 69 extends through the wall of the cylinder 64: and communicates with the tube or pipe 52. It will be noted from this construction that the two cylinders have a communicating passage and that the piston and cylinder will constantly increase until the 1 piston valve 65 uncovers the port 69. By adjusting the piston valve 65 the amount of vacuum in the main cylinder at the time the port 69 is uncovered may be nicely regulated, and consequently the force exerted by the pickers in their operation. As soon as this port is uncovered air will rush in through the inlets 31 and ports 30 to relieve the vacuum and a strong suction is thus exerted at this point whereby the picker, owing to this suction, is enabled to draw down the edge of the bottom article in the pile of comparatively thick or stiff sheets or articles with certainty and to draw them from the bottom of the pile.

The sheets of paper, envelops or other articles, to be operated upon by the machine, may be disposed in almost any manner with more or less regularity, and in the claims herein the term article is employed to denote any material which may be placed upon said receiver to be operated upon by the machine.

The relief port shown in dotted lines in Fig. 4 may be formed in any suitable manner, but a plain opening through the head 54, as shown herein, will answer all practical purposes.

It will be noted that the arrangement of the piston and piston valve provides means whereby the latter aids in producing the vacuum until the port 69 is uncovered, for which reason, in many instances at least, a

smaller main cylinder may be employed In the construction shown in Figs. 6 and 7 the cylinders a and b are independently located, being rigidly secured to a part 0 of the frame. A tubular connection (I! extends between the two cylinders, affording a means of communication between them.

A shaft 0 is employed to actuate the pistons, this shaft having cams 7g with cam grooves fi-i in their faces. A piston rod 70 appurtenant to the cylinder 12 has a forked end Zremovably secured to the rod in any suitable manner. A stud m projects from said rod or its end, which stud bears a roller located within the cam groove h and by means of which the piston receives its reciprocatory movement. The piston rod n, appurtenant to the cylinder at, has a forked end 0 with a projecting stud p bearing a roller located in the cam groove 2', these parts being similarly constructed and operated as above described with regard to the piston rod is.

The shaft 6 extends through the forked ends of the levers, this arrangement providing a guide for the piston rods to insure freedom of movement. The cam groove for the piston rod k will preferably be of a shape to impart a steady reciprocating movement thereto like that shown in the cam :12 hereinafter described, but the cam groove 2' is preferably so shaped as to maintain the piston on the piston rod n at one limit of its play for a considerable period of time, and then gradually move toward the end of the cylinder and then suddenly move to open the port 9 which it controls, and then more or less gradually return it to the end of its stroke. It will be understood that this port 9 is suitably connected with mechanism to be operated by the force of the fluid. It will readily be seen that such operation of both of the pistons will occur by reason of the shape of the cam grooves. The stud p is adjustably mounted in a slot in its bearing member, this con struction providing means for adjusting the position of the piston on the piston rod n and thus vary the time of opening of the port 9.

A relief valve .2 is attached, preferably to the side of the cylinder 6, as herein shown this being of the same general construction as the valve shown in Figs. 4 and 5, and to which reference is made if necessary for an understanding of its construction and operation.

In the form of the device shown in Fig. 8 a single cylinder 1" is provided, having pistons st appurtenant to each end of the cylinder. These pistons have rods 'u,o operated by cams wa: similarly mounted v and operating as hereinbefore described with reference to the device shown in Figs. 6 and 7. A port is formed through the wall of the cylinder, which port is controlled by the movement of the piston 8, this port y being suitably connected with mechanism to be operated by a flow of the current of air created by the pistons in a manner similar to that hereinbefore described.

It will be seen from the above descrip tion that the pistons and cylinders may be connected to operate in unison, or arranged to be operated by means entirely independent each of the other.

While the pistons shown and described herein are of the reciprocatory type, my invention contemplates pistons of other constructions and the invention is therefore not limited to the type of pistons herein disclosed.

I claim 1. A pump including means for creating a flow of air, a chamber having a port through which said flow passes, a piston valve located in said chamber and constituted separately from said flow creating means, said valve being positioned and moved to control said port and temporarily prevent the force produced by said flow creating means from causing a flow of air, and means for operating the piston valve.

2. A pump including a plural number of pistons each separately constituted from the other, means for inclosing said pistons, said inclosing means having a port controlled by one of the pistons to exclusively and temporarily prevent the force produced by one of said pistons from causing a flow of air and means for operating the pistons.

3. A pump including two cylinders having communicating passages between them, one of said cylinders having a port through which flow of fluid passes, pistons mounted in each of the cylinders and cooperating to produce said flow, one of said pistons opening and closing said port to directly stop or permit said flow, and means for operating the pistons.

4. A pump including two cylinders having a communicating passage between them, one of said cylinders having a port through which flow of fluid passes, pistons mounted to reciprocate in said cylinders, one of said pistons opening and closing said port to permit or prevent said flow therethrough, and means for operating the pistons.

5. A pump including a piston and a piston valve cooperating with each other to produce a force to create the flow of a current of fluid, a port through which said current flows, the piston valve being arranged to directly control the opening through the port, and means for operating said pistons.

6. A pump including a main cylinder and an auxiliary cylinder, a piston and a piston valve located one in each of the cylinders and separately movable, said piston and piston valve being relatively positioned and moved the one to exclusively and temporarily prevent the force produced by the other from causing a flow of fluid, and means for operating the pistons.

7. A pump including a main cylinder and anauxiliary cylinder, communicating passages between said cylinders, a piston and a piston valve located one in each of the cylinders and separately movable therein, said piston and valve being relatively positioned and moved. the one to exclusively and temporarily prevent the force produced by the other from causing a How of fluid, operative connections between the piston and valve, and means for operating the piston and valve.

8. A pump including a main cylinder, a piston located in said cylinder, an auxiliary cylinder, a piston valve located therein to temporarily prevent the force exerted by the main piston from causing a flow of air, means for adjusting the position of the piston valve, a port in the auxiliary cylinder controlled by the piston valve, and means for operating each of the pistons.

9. A pump including a main cylinder, a piston therein, an auxiliary cylinder, a piston valve therein to temporarily prevent the force exerted by the main piston from causing a flow of air, communicating passages between the two cylinders, a port leading from the auxiliary cylinder controlled by the piston valve therein, means for adjusting the position of said piston valve to vary the force exerted by the piston in the main cylinder, and means for operating said piston valve.

10. A pump including a main cylinder, an auxiliary cylinder, a piston and a piston valve located one in each of the cylinders and arranged the one to exclusively and temporarily prevent the force produced by the other from causing a flow of air, means for operating said. piston and valve, a relief port in the main cylinder and a valve to control said port.

11. A pump including a main cylinder, a piston therein, an auxiliary cylinder, a piston valve therein, communicating passages between the two cylinders, a port leading from the auxiliary cylinder and controlled by the piston valve therein to temporarily prevent the force exerted by the main piston from causing a flow of air, means for adjusting the position of the piston valve in'the auxiliary cylinder to vary the force exerted by the piston in the main cylinder, means for operating each of the pistons, a relief port in the main cylinder, and a valve to control said port.

12. A pump including a main cylinder, a piston therein, an auxiliary cylinder having a port through which flow of fluid passes, a piston valve located in the auxiliary cylinder to control said'port to temporarily prevent the force produced by the main piston from causing a flow of fluid, and means for operating said piston and piston valve.

13. A pump including a main cylinder having an obstructed inlet thereto, a piston mounted in said cylinder to cause the flow of a current of fluid through said inlet, an auxiliary cylinder, a communicating passage between said cylinders, said auxiliary cylinder having a port through which the entire flow of said fluid passes, a piston valve located in the auxiliary cylinder to open and close said port to temporarily prevent the force exerted by the main piston from causing a flow of fluid, and means for operating the pistons.

14. A pump including a main cylinder having an inlet, a piston mounted in said cylinder, an auxiliary cylinder having a port through which flow of fluid passes for the main cylinder, :1 communicating passage between said cylinders through which said flow passes, a piston valve mounted in the auxiliary cylinder to open and close said port to permit and prevent said flow of fluid, a rigid connection between said pistons, means for adjusting the relative position of the piston valve with respect to the main piston, and means for operating the main piston.

15. A pump including a vacuum cylinder, a piston therein, an auxiliary cylinder having a relief port, a communicating passage between said cylinders, a piston valve located in the auxiliary cylinder to uncover said port to relieve the vacuum created by the main piston, and means for operating the piston valve.

16. A pump including a casing having a chamber with means therein for creating flow of a current of air, a second chamber having a port through Which said flow passes, a piston valve located in said second chamber, said piston valve being positioned and moved to control said port and temporarily prevent the force produced by said flow creating means from causing a flow of air, and means for operating said piston valve.

HENRY B. COOLEY.

lVitnesses C. B. I'IANCE, C. F. LEWIS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

